IP Addressing Summary

Remember these following important points regarding IP addressing:

• The network/host boundary can be anywhere in the 32 bits.

• The Internet allocates a unique bit pattern. These bits are the first bits on the far left and are not available for the administrator to use for networks because they identify your organization to the Internet.

• The Internet authority ARIN (in the United States) will provide the left portion of the address to the organization to use for addressing within a network. These bits are zeroed.

• The network mask is the identification of the bits allocated to the network, defined on all participating routers.

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